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6x-25=4x+20
We move all terms to the left:
6x-25-(4x+20)=0
We get rid of parentheses
6x-4x-20-25=0
We add all the numbers together, and all the variables
2x-45=0
We move all terms containing x to the left, all other terms to the right
2x=45
x=45/2
x=22+1/2
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